The purpose of this research is to identify issues and problems in
current expanded health insurance coverage of calculus removal and subsequently to provide suggestions for health care quality improvement and oral health enhancement through investigation of
public perception and satisfaction about the expanded coverage which is conducted by surveying the level of satisfaction, and revisit and recommendation intention of those who benefited from the expanded coverage.

Method: A questionnaire survey was conducted to adults older than 20 years old living in Seoul and Gyeonggi province from April 1st
to 30th, 2014, and 608 questionnaire copies were finally collected and
used for research analysis. The correlation between the factor analysis of communication measurement tools and variables was analyzed using SPSS 18.0. The differences among general characteristics of respondents, selection standards for medical center, the ones performing
calculus removal, calculus removal time and level of satisfaction
about oral health education, reuse intention were analyzed using the
t-test, One-way ANOVA. The influences on general characteristics of respondents and selection of healthcare provider, practitioner of calculus removal, calculus removal time, oral health education
satisfaction, re-visit intention, recommendation intention were analyzed
using logistic regression analysis(p<0.05).

Result:
1. As for plaque removal experience, non-experience respondents of 608 respondents accounted for high proportion(55.1%), but there was no significant difference. As for whether or not they know the expanded health insurance coverage of calculus removal, the group who checked on ''Know" accounted for higher percentage, 76.9%. The
difference in this respect was made according to academic background and monthly income(p<0.05).

2. The spent time according to who conducted calculus removal and whether or not to provide oral health education were not statistically meaningful. In terms of oral health instruction, ''only about how to use a toothbrush'' was ranked first with 44.9% as for a dentist,
while ''about how to use a toothbrush and oral care products'' as
for a dental hygienist was highest with 57.1%. This showed statistically meaningful difference(p<0.05).
3. Among general characteristics of respondents, academic background had a meaningful influence on level of satisfaction, and revisit and recommendation intention(p<0.05). Who conducted calculus
removal and whether or not they received oral health education
influenced level of satisfaction, and revisit and recommendation
intention in a meaningful way(p<0.05 respectively). When they
were instructed about how to use a toothbrush and oral care products, it had a meaningful impact on revisit intention. It was shown that regularly visited dental clinic affected their level of satisfaction, and revisit and recommendation intention(p<0.05).

4. As for the factors affecting level of satisfaction, when a dental hygienist conducted calculus removal, it was 0.238 times(p=.005)
lower than when a dentist did. When calculus removal time is longer than 10 minutes, revisit intention is reduced only by 0.052 times,
which is meaningfully low. Oral health education with other instructions was 4.818 times and oral health education only verbally
was only 0.206 times, in affecting level of satisfaction, and revisit and recommendation intention respectively. Oral health education
time longer than 10 minutes was 12.410 times (p<0.05). Calculus
removal time longer than 10 minutes was 0.165 times and oral health education time longer than 10 minutes was 11.028 times (p<0.05),
in influencing recommendation intention respectively.


Conclusion: The results of this research showed that academic
background and monthly income made a difference in awareness of expanded health insurance coverage of calculus removal. The level of satisfaction and revisit intention was high when a dentist conducted calculus removal. Who did calculus removal had an influence on satisfaction. Calculus removal time, oral health instruction, the method and time of oral care education were the influential factors on revisit intention. Calculus removal time and oral care education time were the influential factors on recommendation intention.
To promote the recognition of expanded health insurance coverage of calculus removal, level of satisfaction, and revisit and recommendation intention, it is considered that the role of the government and dental professionals is highly significant. Also it is thought that
this public service should be activated through various promoting
strategies and informed in precise way to the public.